The Experts below are selected from a list of 2862 Experts worldwide ranked by ideXlab platform
Jie Chen - One of the best experts on this subject based on the ideXlab platform.
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softening model for failure analysis of insoluble interlayers during salt cavern leaching for Natural Gas Storage
Acta Geotechnica, 2018Co-Authors: Jie Chen, Deyi Jiang, Fei Wu, Junwei Zhang, Fan JinyangAbstract:Failure analyses of the insoluble interlayers are critical for a salt cavern leaching for Natural Gas Storage. In this study, a series of brine immersion tests was carried out to investigate the softening laws of the mechanical characteristics of an argillaceous anhydrite interlayer. The test results show that brine immersion decreases the mechanical strength of the interlayer. A softening depth model of the interlayer specimens was developed based on the experimental results. This model was used to establish a mathematical model of the softening of an overhanging interlayer in a salt cavern during leaching. The softening model can predict the softening scope and the residual strength of the interlayer in different softening zones at different leaching times. The model was integrated with a numerical simulation to analyze the characteristics of failure of an overhanging interlayer. It was found that the interlayer tends to fail when the brine immersion time reaches a certain value in the simulation. Finally, the influence of environmental and artificial factors on the softening laws of the insoluble interlayer was discussed. It was found that the matrix structure and soluble components of the interlayer are two significant environmental factors and the brine immersion time is the key artificial factor. Therefore, the failure of an interlayer can be controlled by adjusting the brine immersion time during leaching a salt cavern.
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comprehensive feasibility study of two well horizontal caverns for Natural Gas Storage in thinly bedded salt rocks in china
Energy, 2018Co-Authors: Deyi Jiang, Jie Chen, J J K Daemen, Kang Tang, Fei WuAbstract:Abstract Underground salt caverns provide ideal space for large-scale Natural Gas Storage. But the current practice of constructing single-well-vertical (SWV) caverns encounter serious problems in the thinly-bedded salt rocks in China. Instead, two-well-horizontal (TWH) caverns are proposed to serve as a possible alternative for Gas Storage facilities. Therefore the comprehensive feasibility of the TWH-caverns as Gas Storage were thoroughly evaluated. First, the frame-work and criteria of feasibility evaluation of Gas Storage salt caverns were determined. Then the construction process and shapes of TWH-cavern were determined by physical simulation tests, and an optimum cavern shape was obtained by numerical simulation. Thirdly, the effects of mudstone interbeds, cyclic operating modes on the serviceability and safety of TWH-cavern were investigated. The cavern tightness was discussed as well. In the end, a feasibility comparison between a TWH-cavern and a SWV-cavern was made, which shows that TWH-cavern possesses better safety, higher flexibility and lower cost than SWV-cavern. Comprehensive results show that the TWH-caverns have high feasibility as Gas Storage in thinly-bedded salt rocks.
Roger D. Aines - One of the best experts on this subject based on the ideXlab platform.
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Analysis of fault leakage from Leroy underground Natural Gas Storage facility, Wyoming, USA
Hydrogeology Journal, 2013Co-Authors: Mingjie Chen, Thomas A. Buscheck, J Wagoner, Joshua A. White, Laura Chiaramonte, Roger D. AinesAbstract:O local de armazenamento de gás Natural de Leroy é um sistema de aquífero-armazém num anticlinal, limitado por falhas, localizado em Wyoming, EUA. Com base em dados abundantes, no historial da percolação não controlada e no subsequente controlo pelos operadores da estrutura, foi desenvolvida uma rede de modelos para estudar o comportamento do reservatório, examinando o inventário dos dados históricos da pressão e do gás, bem como a percolação de gás e salmouras, e avaliando a sensibilidade deste comportamento com a incerteza sobre as propriedades do reservatório. Um modelo tridimensional englobando as falhas de fronteira, a estratigrafia das camadas geológicas e a superfície topográfica foi calibrado com base nos dados históricos da pressão no reservatório e do inventário de gás. O modelo calibrado previu uma chegada de gás à superfície do solo consistente com os tempos observados da presença de bolhas de gás num pequeno ribeiro. Foi realizada uma análise de sensibilidade global para examinar os parâmetros que influenciam a percolação nas falhas e foi efetuada uma análise da estabilidade geomecânica para investigar a probabilidade de reativação das falhas. Em geral, é demostrado que é necessária uma via de percolação discreta para explicar a fuga de gás e o seu subsequente controlo operacional por redução de pressão no reservatório. Especificamente, os resultados indicam que a percolação através da falha é uma explicação plausível para a fuga de gás observada. Os resultados são relevantes para outros locais de armazenamento de gás Natural, bem como para outras aplicações de armazenamento subterrâneo de fluidos flutuantes, tais como o CO_2. Le site de stockage de gaz naturel de Leroy est un système aquifère dans un anticlinal bordé par faille, localisé dans le Wyoming, USA. A partir de données historiques abondantes sur les fuites non contrôlées et des contrôles postérieurs par les opérateurs de l’installation, un modèle conceptuel cadre a été développé pour étudier le comportement du réservoir, en examinant les séries chronologiques de pression et de réserves de gaz, ainsi que les fuites de gaz et de saumure et en évaluant la sensibilité des réponses aux incertitudes sur les propriétés du réservoir. Un modèle tridimensionnel incluant la faille bordière, la stratification géologique et la surface topographique a été calibré avec les données historiques des pressions et réserves de gaz du réservoir. Le modèle calibré prédisant l’arrivée du gaz à la surface du sol est conforme au temps de dégagement gazeux observé dans un ruisseau. Une analyse globale de sensibilité a été effectuée pour examiner les paramètres influençant la fuite par la faille, et une analyse de stabilité géomécanique a été réalisée pour étudier la probabilité de la réactivation de la faille. De manière générale, on a montré qu’un passage distinct est nécessaire pour expliquer la fuite de gaz observée et son contrôle opérationnel ultérieur par la diminution des pressions dans le réservoir. En particulier, les résultats indiquent que la fuite par la faille est une explication plausible de la perte de gaz observée. Les résultats sont applicables à d’autres sites de stockage de gaz naturel, ainsi qu’à des applications de stockage en sub-surface de fluides volatils, tels que le CO_2. Leroy地下天然气储藏库是位于美国怀俄明州的一个背斜式的以断层为西边界的含水层储气系统。基于其详细的操作,泄漏及随后的控制历史数据,我们创建了一个模型体系来研究气库状态,模拟压力和库存气量的历史以及气和水的泄漏,并且评估气库状态对地质水文参数的敏感性。其中三维气体运移模型囊括了储气库的边界断层,地层结构和表面地形。储气库的压力和储存量历史数据用来校正这个三维模型。运用校正后的模型预测得到的通过断层泄漏到地表的气量和时间符合观测数据。全局敏感性分析评估了各种气库参数对断层气体泄漏的影响。地质力学稳定性分析对断层重新激活进行了风险评价。我们的研究表明通过断层泄漏的机制解释了Leroy储气库的泄漏以及随后的减压控制历史。本文的研究结果对其他相关地下储气库,比如CO_2地质储藏研究有重要的借鉴作用. El sitio de almacenamiento de Gas Natural de Leroy es un sistema de almacenamiento acuífero anticlinal limitado por falla, localizado en Wyoming, EEUU. Basados en abundantes datos de su historia de filtraciones no controladas y el subsecuente control por los operarios de la instalación se desarrolló un esquema de modelado para estudiar el comportamiento del reservorio, examinando la historia e inventario de las presiones de Gas, así como de las filtraciones de Gas y de salmuera, y para evaluar la sensibilidad de aquel comportamiento con respecto de las incertidumbres de las propiedades del reservorio. Se calibró un modelo tridimensional que abarca el contorno de la falla, la estratigrafía geológica en capas y la superficie topográfica mediante los datos históricos de la presión y el inventario de Gas del reservorio. El modelo calibrado predijo el arribo del Gas a la superficie del terreno que fue consistente con el tiempo del burbujeo de Gas observado en un arroyo. Se realizó un análisis de sensibilidad global para examinar los parámetros que influyen en la filtración en la falla, y se llevó a cabo un análisis de estabilidad geomecánica para investigar la probabilidad de la reactivación de la falla. En general, se muestra que se requiere una trayectoria discontinua para explicar la filtración de Gas observada y su subsecuente control operacional mediante la reducción de las presiones del reservorio. Específicamente, los resultados indican que la filtración es una explicación plausible para la pérdida de Gas observada. Los resultados son relevantes respecto de otros sitios de almacenamiento de Gas Natural, así como para otras aplicaciones de almacenamientos subsuperficiales de fluidos flotantes, tal como el CO_2. Leroy Natural-Gas Storage site is an anticlinal, fault-bounded, aquifer-Storage system located in Wyoming, USA. Based on its abundant data, uncontrolled leakage history and subsequent control by the facility operators, a modeling framework was developed for studying reservoir behavior, examining pressure and Gas-inventory histories, as well as Gas and brine leakage, and evaluating the sensitivity of that behavior to uncertainty about reservoir properties. A three-dimensional model capturing the bounding fault, layered geologic stratigraphy, and surface topography was calibrated by history data of reservoir pressure and Gas inventory. The calibrated model predicted Gas arrival at the ground surface that was consistent with the timing of observed Gas bubbling into a creek. A global sensitivity analysis was performed to examine the parameters influencing fault leakage, and a geomechanical stability analysis was conducted to investigate the likelihood of fault reactivation. In general, it is shown that a discrete leakage pathway is required to explain the observed Gas leakage and its subsequent operational control by reducing reservoir pressures. Specifically, the results indicate that fault leakage is a plausible explanation for the observed Gas leakage. The results are relevant to other Natural-Gas Storage sites, as well as other subsurface Storage applications of buoyant fluids, such as CO_2.
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Analysis of fault leakage from Leroy underground Natural Gas Storage facility, Wyoming, USA
Hydrogeology Journal, 2013Co-Authors: Mingjie Chen, Thomas A. Buscheck, J Wagoner, Joshua A. White, Laura Chiaramonte, Roger D. AinesAbstract:Leroy Natural-Gas Storage site is an anticlinal, fault-bounded, aquifer-Storage system located in Wyoming, USA. Based on its abundant data, uncontrolled leakage history and subsequent control by the facility operators, a modeling framework was developed for studying reservoir behavior, examining pressure and Gas-inventory histories, as well as Gas and brine leakage, and evaluating the sensitivity of that behavior to uncertainty about reservoir properties. A three-dimensional model capturing the bounding fault, layered geologic stratigraphy, and surface topography was calibrated by history data of reservoir pressure and Gas inventory. The calibrated model predicted Gas arrival at the ground surface that was consistent with the timing of observed Gas bubbling into a creek. A global sensitivity analysis was performed to examine the parameters influencing fault leakage, and a geomechanical stability analysis was conducted to investigate the likelihood of fault reactivation. In general, it is shown that a discrete leakage pathway is required to explain the observed Gas leakage and its subsequent operational control by reducing reservoir pressures. Specifically, the results indicate that fault leakage is a plausible explanation for the observed Gas leakage. The results are relevant to other Natural-Gas Storage sites, as well as other subsurface Storage applications of buoyant fluids, such as CO2.
Bahman Tohidi - One of the best experts on this subject based on the ideXlab platform.
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methane Natural Gas Storage and delivered capacity for activated carbons in dry and wet conditions
Fuel, 2008Co-Authors: Hesam Najibi, Antonin Chapoy, Bahman TohidiAbstract:Abstract Methane/Natural Gas Storage and delivered capacity for three different activated carbons in dry and wet conditions were measured. In all tests the temperature of the bed was maintained constant at 277.15 K and pressure was increased up to 10 MPa. Natural Gas Storage capacity was less than methane Storage capacity in dry conditions for all the three activated carbons tested, while the Gas delivery was almost the same. One of activated carbon tested (NC120) showed the possibility of hydrate forming for pressures higher than 4 MPa but the amount of Gas stored still was less than the amount stored in dry conditions over the whole range of pressure. The analysis of the Gas delivered at each pressure steps shows that considerable amount of heavy components do not come out from the bed even at very low pressures in both dry and wet condition tests. Repeatability of the sorption/desorption processes – vital for possible commercial/industrial use – has been examined over various cycles.
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Methane/Natural Gas Storage and delivered capacity for activated carbons in dry and wet conditions
Fuel, 2007Co-Authors: Hesam Najibi, Antonin Chapoy, Bahman TohidiAbstract:Abstract Methane/Natural Gas Storage and delivered capacity for three different activated carbons in dry and wet conditions were measured. In all tests the temperature of the bed was maintained constant at 277.15 K and pressure was increased up to 10 MPa. Natural Gas Storage capacity was less than methane Storage capacity in dry conditions for all the three activated carbons tested, while the Gas delivery was almost the same. One of activated carbon tested (NC120) showed the possibility of hydrate forming for pressures higher than 4 MPa but the amount of Gas stored still was less than the amount stored in dry conditions over the whole range of pressure. The analysis of the Gas delivered at each pressure steps shows that considerable amount of heavy components do not come out from the bed even at very low pressures in both dry and wet condition tests. Repeatability of the sorption/desorption processes – vital for possible commercial/industrial use – has been examined over various cycles.
Carmela Vaccaro - One of the best experts on this subject based on the ideXlab platform.
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Design of a smart Gas detection system in areas of Natural Gas Storage
2017 IEEE International Geoscience and Remote Sensing Symposium (IGARSS), 2017Co-Authors: Ana M. C. Ilie, Carmela VaccaroAbstract:This paper focus on the development of a new device suitable to detect and measure methane Gas in areas of Natural Gas Storage site. This device, the Smart Gas Detection system, can measure the air and water quality, including all the parameters that can have outliers by an eventual Gas leak in the aquifer or atmosphere. The air quality parameters measured by low cost sensors, include CH4 and CO2 Gas, while for water quality parameters measured include temperature, pH and electrical conductivity. The sensor node is based on Arduino UNO microcontroller, receiving the data from the sensors and transmitting to the database on Raspberry pi 3, remotely accessing all the data. It is extremely important to develop devices with the new commercial low-cost sensors to detect and measure Gases in atmosphere to monitoring the carbon dioxide and methane due to their role as greenhouse Gases and also Gas leaks from wellbores can severely affect the health of people and animal.
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IGARSS - Design of a smart Gas detection system in areas of Natural Gas Storage
2017 IEEE International Geoscience and Remote Sensing Symposium (IGARSS), 2017Co-Authors: Ana M. C. Ilie, Carmela VaccaroAbstract:This paper focus on the development of a new device suitable to detect and measure methane Gas in areas of Natural Gas Storage site. This device, the Smart Gas Detection system, can measure the air and water quality, including all the parameters that can have outliers by an eventual Gas leak in the aquifer or atmosphere. The air quality parameters measured by low cost sensors, include CH 4 and CO 2 Gas, while for water quality parameters measured include temperature, pH and electrical conductivity. The sensor node is based on Arduino UNO microcontroller, receiving the data from the sensors and transmitting to the database on Raspberry pi 3, remotely accessing all the data. It is extremely important to develop devices with the new commercial low-cost sensors to detect and measure Gases in atmosphere to monitoring the carbon dioxide and methane due to their role as greenhouse Gases and also Gas leaks from wellbores can severely affect the health of people and animal.
Michael J. Economides - One of the best experts on this subject based on the ideXlab platform.
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Purposefully built underground Natural Gas Storage
Journal of Natural Gas Science and Engineering, 2012Co-Authors: Xiuli Wang, Michael J. EconomidesAbstract:Abstract The volumes of Natural Gas that are needed for a wide variety of industrial processes plus domestic uses vary significantly with respect to time, location, and demand. Thus, mechanical Storage of Natural Gas in manufactured containers is not economically feasible or even logistically possible. Although much of the Storage and withdrawal have been associated with seasonality, Storage is becoming essential in an integrated Natural Gas supply network. It is particularly important in large operations, such as being a backup fuel in power generation and in sustaining the rate for liquefied Natural Gas (LNG) production. Therefore, the design of underground Natural Gas Storage becomes essential. Important components of Natural Gas Storage engineering include capacity which is affected by reservoir volume and tolerable pressure; injection or producing rates which are affected by reservoir permeability, Natural reservoir drive mechanism, well completion/stimulation; and the impact of cyclical losses. We present here a new sequence of calculations and estimations for monitoring and forecasting Gas movements through an underground Gas Storage reservoir: • Maximum capacity estimation with a new type of graphical construction, blending concepts of the classical p / Z vs. cumulative recovery straight line in Natural Gas production. • Prediction of withdrawal rates and time, constrained by decreasing Storage pressure. • Determination of maximum or sustainable withdrawal rate for a period of time. In all cases considered, the injecting and producing wells are hydraulically fractured. The hydraulic fractures are designed for the withdrawal rate. Thus, the required number of wells is determined. We apply these concepts to an underground Natural Gas Storage facility and forecast the injection and production rates, cumulative Storage and withdrawal, pressure buildup and decline as a function of time. A case study is presented here to demonstrate an appropriate sequence for designing an underground Natural Gas Storage facility so that it can meet certain functionalities. In this case, the underground Storage facility needs to provide enough Gas to support a 1000 MW Gas-fired power plant for continuous 90-day operating period (in the case of emergency).
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Purposefully built underground Natural Gas Storage
Journal of Natural Gas Science and Engineering, 2012Co-Authors: Xiuli Wang, Michael J. EconomidesAbstract:The volumes of Natural Gas that are needed for a wide variety of industrial processes plus domestic uses vary significantly with respect to time, location, and demand. Thus, mechanical Storage of Natural Gas in manufactured containers is not economically feasible or even logistically possible. Although much of the Storage and withdrawal have been associated with seasonality, Storage is becoming essential in an integrated Natural Gas supply network. It is particularly important in large operations, such as being a backup fuel in power generation and in sustaining the rate for liquefied Natural Gas (LNG) production. Therefore, the design of underground Natural Gas Storage becomes essential. Important components of Natural Gas Storage engineering include capacity which is affected by reservoir volume and tolerable pressure; injection or producing rates which are affected by reservoir permeability, Natural reservoir drive mechanism, well completion/stimulation; and the impact of cyclical losses. We present here a new sequence of calculations and estimations for monitoring and forecasting Gas movements through an underground Gas Storage reservoir:. • Maximum capacity estimation with a new type of graphical construction, blending concepts of the classical p/. Z vs. cumulative recovery straight line in Natural Gas production.• Prediction of withdrawal rates and time, constrained by decreasing Storage pressure.• Determination of maximum or sustainable withdrawal rate for a period of time. In all cases considered, the injecting and producing wells are hydraulically fractured. The hydraulic fractures are designed for the withdrawal rate. Thus, the required number of wells is determined. We apply these concepts to an underground Natural Gas Storage facility and forecast the injection and production rates, cumulative Storage and withdrawal, pressure buildup and decline as a function of time.A case study is presented here to demonstrate an appropriate sequence for designing an underground Natural Gas Storage facility so that it can meet certain functionalities. In this case, the underground Storage facility needs to provide enough Gas to support a 1000 MW Gas-fired power plant for continuous 90-day operating period (in the case of emergency). © 2012 Elsevier B.V.
